Canon General Purpose/Event Lens

inevitablyissie wrote:

That is a good point about the crop sensor, could someone clarify whether EF-S lenses are affected by the crop as well? Because I was originally under the impression they were built around the crops, so a 55-250 is a 55-250 not an 88-400, but I've been told otherwise. I'm just a little confused...

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Your Camera is Your Companion

Focal length is focal length. Canon does not label its EF-S lenses with a mathematically-adjusted figure. Canon's EF-S 24mm lens will "see" the same angle-of view as a Canon EF 24mm lens. The smaller sensor of the APS-C camera body effectively crops the images, which are then effectively magnified when viewing at any given image size, whether it be on the camera's LCD, or on a monitor.

On the original topic, well, the only EF-S-spec lens I bought new is my EF-S 10-22mm, which is a wonderful optical instrument, but must be used carefully at events populated by human subjects, as the rectilinear effect, that keeps vertical lines true, will distort rounded, 3D things, such as human heads and bodies, near the borders of the image.

I preferred a 35mm prime lens at events, perhaps supplemented by the 10-22mm, until I added a pre-owned 5D, and later, D700 cameras, which are full-35mm-frame sensor cameras, with no crop factor. I have not, however, been "the" photographer at an event, expected to produce "the" images, so my lack of a general-purpose/mid-range EF-S zoom was not a problem for me. (A Nikkor 24-70/2.8G lens is my current "event" lens, though, of course, on a Nikon full-35mm-frame-sensor camera.)